Fracture of the Ankylosed Spine Following a Direct Anterior Approach for Total Hip Arthroplasty on a Fracture Table: A Case Report.

Fracture-dislocation of the ankylosed spine is a rare complication following THA. We recommend lateral decubitus positioning, pelvic and back support, careful limb manipulation, and an in situ femoral neck osteotomy to avoid excessive loads on the stiff spine during THA.